Several years back, I got an adorable coat (very classic--seafoam green with a grey flannel lining) for my then-Persian. They have a monogramming option as well.
For more upscale, funky styles, there is a local shop (Minneapolis area) that is wildly loved by cat and dog owners alike. Their product page is currently under construction, but in case you wanted to check back later, here is a link:
http://www.luluandluigi.com